A Riverside Preparatory High School student was arrested Thursday after making threats to shoot up the school and other students. According to the SBSO Victor Valley station, a search of the suspects home found a ‘high volume of firearms”. Riverside Preparatory High School is located in Oro Grande, California just outside of Victorville. The school is located along old Route 66 at 19900 National Trails Hwy in Oro Grande. The regularly scheduled football game went on as scheduled Thursday night.